Charge pump circuit and method thereof

Details Charge pump circuit and method thereof Charge pump circuit and method thereof

2007-10-30

2007-10-30

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

11278145

ABSTRACT:
A charge pump circuit capable of canceling current mismatch and suppressing clock feedthrough. The charge pump circuit comprises a current source enabled by a first logical signal, a current sink enabled by a second logical signal, an integrating capacitor coupled to both the current source and the current sink, and a switching device coupled between the integrating circuit and an output node. The switching device has two states. The switching device is set to a first state whenever a third logical signal is asserted and one of the first logical signal, the second logical signal, and a modulating signal is enabled. The switching device is set to a second state whenever the third logical signal is de-asserted, or none of the first logical signal, the second logical signal, and the modulating signal are asserted.

REFERENCES:
patent: 6118346 (2000-09-01), Olgaard
patent: 6262610 (2001-07-01), Lo et al.
patent: 6326852 (2001-12-01), Wakayama
patent: 6566920 (2003-05-01), Kim
patent: 6593817 (2003-07-01), Magazz' et al.
patent: 7016450 (2006-03-01), Lin et al.
patent: 7019571 (2006-03-01), Lim
patent: 2002/0050864 (2002-05-01), Wakayama
patent: 2006/0033554 (2006-02-01), Matsunami
patent: 2 384 123 (2003-07-01), None
Marco Cassia, Peter Shah, Brik Druun, “Analytical Model and Behavioral Simulation Approach for a ΣΔ Fractional-N Synthesizer Employing a Sample-Hold Element”, IEEE Transactions on Circuits and Systems-II. Analog and Digital Signal Processing, Nov. 2003, pp. 850-859, vol. 50, No. 11, IEEE.

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